Akuma… Another word meaning Devil, Evil spirit, and most of all, Satan. Akuma stood above Oni, the demons, and were levelled at the same position as Kami(gods). Many similarities were shared, which was why they were put together even for their large differences. There were very few of Akuma, for they stood above Oni, and only few were ever powerful enough to be called a kami. Kami were able to create and destroy, as also Akuma, but there was still a large difference between the two. Kami are all knowing and so they know of the future and the past, Akuma cannot. Akuma can only gamble with their luck and hope for something to happen. As kami are able to know everything, it cannot be anything of this world, therefore, it does not exist here, but another world. If they are not of this world, they must be the strongest and most formidable creatures, but Akuma live in this world, as the strongest before Kami. Some Akuma invade humans, and grows, eventually overpowering it, the Akuma develops into a strong monster. A mere human can turn into a strong creature, one to kill all, but if Akuma exist, why are we still alive? Kami don't live in this world to save us. Therefore, something protects humans and destroys Akuma, something that is more powerful than Kami, yet does not have the power to destroy or recreate. What could possibly destroy an evil Akuma, if it is weaker than it? It's intelligence is the same as a human, and fighting abilities are of human, yet they are somehow stronger than humans. Just what are these creatures? For now, let us call them spirits, for we do not know what they really are or what they look like, but we believe they are there. We can call these spirits, Seishin. Seishin are stronger than Akuma, and higher of kami, and so, Seishin are the most powerful creatures, and becoming one, was a dream of a child because they wanted to be the strongest of all.

Hi there! this is just kind of a prologue you could say to a One Piece fanfiction. It kinda has a message/moral, which is why the talk of akuma kami and seishin. Akuma is basically Satan or the devil, Kami is God, and Seishin another word for spirit. All of these terms are actually Japanese because I often use Japanese reference in my stories. I am making the 1st chapter right now so please wait! Thanks for reading!